hole size for anchoring PT plates with 0.5" bolts

amakarevic

i am anchoring PT plates for my 11x9 shed with 0.5" bolts into concrete. was wondering which size SDS-plus drill bits i should use to drill the holes. i need exact size cause these bits ain't exactly cheap (cca $25) so i'd rather not buy two for experimenting (gotta be frugal these days). 5/8 makes a tighter fit with anchoring epoxy but i was thinking to go all the way 3/4 to make more room for epoxy for strength. please advise.

thanks

bob22

Why not use something like these on this link:
http://www.bestnutsbolts.com/anchors.html
No worries about epoxy and sizing.

epson

You can use this system: http://www.ucanfast.com/products/details.php?category=Chemical+Anchors&c=3&subcateg ory=Anchoring+Cement+%26+Glass+Capsules&sc=176&pro ductid=137
Part # HAC 12
Size M12 x 95
Treaded Rod Dia. ½’’
Drill Size 9/16’’
Hole depth for rod 4’’
We use these all the time…
Or you can just use a 9/16’’ sds drill bit for your ½’’ anchor but make sure it is a wedge anchor or like you suggested using a ¾’’ sds drill bit but now you have to use something like rockite self leveling and patching cement with your ½’’ dia. Threaded rod with a nut and washer. We have used all of these and had no problems with them.

amakarevic

I am using the most regular decking bolts, 1/2x6. I do want to use anchoring epoxy, i.e. not just screw it snug. I would test with 5/8 first but I sort of wanna avoid testing different drill bit sizes as I just wanna use the perfect size as I am on a budget and don't wanna buy more than the only one that's the perfect choice. They cost $25 each ... Please advise.

Mr Chips

There is such a thing as too much epoxy. and not all epoxies are the same ( some aren't even really epoxy). best bet is to follow the mfg's recomendations for bolt size and hole size. make sure you blow and/or vacuum the dust from the holes

__________________
Those who can, do...
Those who can't criticize on the internet